Do you like your rainbow of flavor to be sorted by discrete wavelength? If so, then you’ll appreciate Brian Egenriether‘s Skittles Sorting Machine 2. Using an IR LED and phototransistor to determine the appropriate color, a BASIC Stamp 2 controls three servo motors to actuate a turnstile and chute selector to deliver the identified confection to a predetermined collection bowl.[via Reddit]

Read the softness on the stone. Turquoise is a comparatively soft rock, coming in simply around a five or six for the Mohs Scale regarding Hardness. Lots of the stones employed to “fake” turquoise less complicated harder in general. It is important to make sure the aqua collected is genuine.